drm/i915: Fix SDVO TV support

This brings SDVO TV support from 2D driver, including origin
fix f1ca56e17d0 and later fix 2fcf4fcccfe. Also fix wrong modeline
definitions for SDVO TV.

Signed-off-by: Zhenyu Wang <zhenyu.z.wang@intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>

1 files changed, 20 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 0b33760b04cb..64773ce52964 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1106,6 +1106,26 @@ static int intel_crtc_mode_set(struct drm_crtc *crtc,
                 return -EINVAL;
         }
 
+        /* SDVO TV has fixed PLL values depend on its clock range,
+           this mirrors vbios setting. */
+        if (is_sdvo && is_tv) {
+                if (adjusted_mode->clock >= 100000
+                                && adjusted_mode->clock < 140500) {
+                        clock.p1 = 2;
+                        clock.p2 = 10;
+                        clock.n = 3;
+                        clock.m1 = 16;
+                        clock.m2 = 8;
+                } else if (adjusted_mode->clock >= 140500
+                                && adjusted_mode->clock <= 200000) {
+                        clock.p1 = 1;
+                        clock.p2 = 10;
+                        clock.n = 6;
+                        clock.m1 = 12;
+                        clock.m2 = 8;
+                }
+        }
+
         if (IS_IGD(dev))
                 fp = (1 << clock.n) << 16 | clock.m1 << 8 | clock.m2;
         else